WASHINGTON – DFL U.S. Sen. Amy Klobuchar’s war chest keeps expanding. Her re-election campaign announced Friday that the first-term Senator raised just over $1 million in the first quarter of 2012 and has just under $5.2 million cash on hand.

One of Klobuchar’s potential GOP rivals, National Guard veteran Pete Hegseth reported this week that he raised $160,000 in his effort for the Republican endorsement.

More than 25 percent of Klobuchar’s million dollar haul came from donors giving less than $200. About 50 percent came from donors giving more than $200 and political action committees contributed about 23 percent of her funds.